DR VIXMOM re: the VIXTER seeing SWEENEY TODD.
I think each person is different. I know my mom looked away during the violence (she found it overly graphic).
I personally do not like violence at all, and agree with DR Jose. I found that they made things so over the top, that i did not find it horrific in the least.
The blood was so bright. Everything was so fake. I did not look away once.
If the Vixter loves musicals (which she does) then i think this is a movie she should see.  Although like DR MattH said, if she has not seen it until now, she can probably wait for the dvd.
I would also see if you could view a few clips online, just so you get a sense of what the movie is like.  It's hard for us to explain it.  I personally found the tone so grim and dismal.  But i don't think it is too much for most teens.